Maryland plans to develop a 16-mile light rail project in the Washington D.C. suburbs through what will be the largest public-private partnership and the first P3 for a transit project in the state, government leaders announced Monday.

The Purple Line project, which will link Montgomery and Prince George’s counties, is expected to cost a total of $2.2 billion. To date, $109 million has been spent on the project, and the state is pledging another $400 million for construction and $280 million for right-of-way acquisition and the final design. The remainder will be paid for with private investment as well as federal grants and state and local contributions, state officials said during a press conference in Bethesda.

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